<template>
  <view class="search-box">
    <uni-search-bar  @input="input" :radius="100" cancelButton="none"></uni-search-bar>
  </view>
  
  <view class="sugg-list" v-if="searchResults.length !== 0">
    <view class="sugg-item" v-for="(item,i) in searchResults" :key="i" @click="gotoDetail(item)">
      <view class="goods_name">{{item.goods_name}}</view>
      <uni-icons type="arrowright" size="16"></uni-icons>
    </view>
  </view>
  
  <view class="hitsory-box" v-else>
    <view class="history-title">
      <view>搜索历史</view>
      <uni-icons type="trash" size="17" @click="clearSearchHisytory"></uni-icons>
    </view>
    <view class="history-list">
      <uni-tag :text="item" v-for="(item,i) in histores" :key="i" @click="gotoGoodsList(item)"></uni-tag>
    </view>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        timer:null,
        kw:'',
        searchResults:[],
        historyList:[]
      };
    },
    onLoad() {
      this.historyList=JSON.parse(uni.getStorageSync("kw") || "[]")
    },
    methods:{
      input(e){
        clearTimeout(this.timer)
        this.timer=setTimeout(()=>{
          this.kw=e
          this.getSearchList()
        },1000)
      },
      async getSearchList(){
        if(!this.kw){
          this.searchResults=[]
          return
        }
        const {data:res}=await uni.$http.get('/api/public/v1/goods/qsearch',{query:this.kw})
        if(res.meta.status !== 200) return uni.$showMsg()
        this.searchResults=res.message
        this.saveHistoryList()
      },
      gotoDetail(item){
        uni.navigateTo({
          url:"/subpkg/goods_details/goods_details?goods_id=" + item.goods_id
        })
      },
      saveHistoryList(){
        //if(!this.historyList.includes(this.kw)) this.historyList.unshift(this.kw)
        const set = new Set(this.historyList)
        set.delete(this.kw)
        set.add(this.kw)
        this.historyList=Array.from(set)
        //搜索历史记录持久化存储
        uni.setStorageSync("kw",JSON.stringify(this.historyList))
      },
      clearSearchHisytory(){
        this.historyList=[]
        uni.setStorageSync("kw",JSON.stringify(this.historyList))
      },
      gotoGoodsList(item){
        uni.navigateTo({
          url:"/subpkg/goods_list/goods_list?query="+item
        })
      }
    },
    computed:{
      histores(){
        return [...this.historyList].reverse()
      }
    }
  }
</script>

<style lang="scss">
  .search-box{
    position: sticky;
    top: 0;
    z-index: 999;
  }
  
  .sugg-list{
    padding: 0 5px;
    .sugg-item{
      font-size: 12px;
      padding: 13px 0;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid #efefef;
      .goods_name{
        //文字不允许换行
        white-space: nowrap;
        //溢出部分隐藏
        overflow: hidden;
        //文本溢出后用...表示
        text-overflow: ellipsis;
        margin-right: 3px;
      }
    }
  }
  .hitsory-box{
    padding: 0 5px;
    .history-title{
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 40px;
      font-size: 13px;
      border-bottom: 1px solid #efefef;
    }
    .history-list{
      display: flex;
      margin-right: 5px;
      .uni-tag{
        margin-top: 5px;
        margin-right: 5px;
      }
    }
  }

</style>
